WORK MACHINE ENGINE CONTROL DEVICE AND ENGINE CONTROL METHOD

摘要

In order to improve fuel economy by setting a target engine output according to the intention of an operator, a work machine engine control device comprises: an engine output permission reduction information generating block (301) that sets a total lever operation amount reduction flag (D300) while the total lever operation amount from an operation lever is being reduced; an actual engine output calculating block (242) that calculates the actual engine output (D400) on the basis of the engine torque and the engine rotational speed; an actual engine output latch function block (302) that latches and outputs the highest actual engine output up until the present while the total lever operation amount reduction flag (D300) is not set and that outputs the present actual engine output while the total lever operation amount reduction flag (D300) is set; a target engine output calculating unit (303) that calculates and outputs the target engine output on the basis of the engine output that is output by the actual engine output latch function block (302); and an engine controller that controls the engine rotational speed under the limitation of the target engine output.